Windmill.



S. G. BARR.

WINDMILL.

APPLICATION FILED FEBA, 1 914. I L1Q957$9- Patented Feb. 23, 1915.

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S. G. BARR.

WINDMILL.

APPLIOAI'ION FILED I'EB.4, 1914.

1 1 Q Patented Feb. 23, 1915.

2 8HEETS-SHEET 2.

WINDMILL.

Specification of Letters Patent.

Patented Feb. 23 1915 Application filed February 4, 1914. Serial No.816,428.

To all whom it may concern:

Be it known that I, SAMUEL G. BARR, a citizen of the United States,residing at Laredo, in the county of Grundy and State of Missouri, haveinvented new and useful Improvements in lVindmills, of which thefollowing is a specification.

This invention relates to wind mills and it consists in the novelfeatures hereinafter described and claimed.

An object of the invention isto provide a wind mill of simple structureand which includes a tower having a shaft journaled therein and providedwith a series of blades at its upper end. A shield partially inclosesthe set of blades and an arm is connected with the shield and isarranged to rotate about the axis of the shaft. A vane is carried by thearm and means provided for securing the arm at an adjusted position uponthe tower. The parts are so arranged that the shield may be disposed soas to cause the set of blades to rotate in either of two directions orthe said shield may be interposed between the wind and the set of bladeswhereby the set of blades will remain at a state of rest.

In the accompanying drawings :Figure 1 is a side elevation of the mill.Fig. 2 is a top plan view of the same. Fig. 3 is a perspective view ofan arm and attached parts used upon the mill. Fig. 4 is a detailedsection view of one form of retaining bolt mechanism used upon the mill.Fig. 5 is a detailed sectional view of the lower portion of the mill.Fig. 6 is a perspective view of a -modified arrangement ofthe parts ofthe mill.

The mill comprises a tower 1 which may be of any suitable structure anda vertically disposed shaft 2 is journaled for rotation in the tower. Agear wheel 3 is fixed to the lower portion of the shaft 2 and may beemployed for transmitting movement from the said shaft to machines ordevices which are operated by the mill. The shaft 2 is provided at itsupper end and above the upper end of the tower 1 with a series of bladesor vanes 4. An arm 5 is journaled upon the upper portion of the shaft 2below the vanes 4 and above the upper end of the tower 1 and carries ashield 6 which partially incloses the set of blades 4. The arm 5 isprovided at that end opposite the end thereof at which the shield 6 islocated with a vertically disposed vane 7.

An arcuate guide 8 is mounted at the upper end portion of the tower 1and the arm 5 is provided with a bracket 9, as shown in Figs. 1, 3 and4, which extends under the lower portion of the said guide 8. The gulde8 is provided at intervals With perforations 10. bracket 9 and a bolt 12is slidably mounted 1n the case. A stop 13 is mounted on the bolt 12between the ends of the case 11 and a coiled spring 14 bears at one endagainst the end of the case and at the other end against the stop 13.The said spring is un der tension with a tendency to hold the end of thebolt 12 toward the guide 8. The bolt 12 is also provided at one end withan eye 15 with which a rope or cable 16 is connected.

The operation of the mill is as follows: By grasping the cable 16 anddrawing in a downward direction upon the same the bolt 12 may be movedout of contact with the guide 8 and by using the rope 16 the arm 5 maybe swung upon its pivotal connection with the shaft 2 so that the shield6 may be brought between the wind and the blades 4. Then by releasingthe rope 16 tension of the spring 14 comes into play and the bolt ismoved longitudinally whereby the end of the said bolt is caused to enterone of the perforations 10 in the guide 8 and the parts are held at theadjusted positions. When the shield 6 is interposed between the wind andblades 4 the said blades will remain at rest. By using the cable 16 andswinging the arm 5 so that the blades 4 at one side of the axis of theshaft 2 will be exposed to the wind the said shaft 2 will be rotated bythe force of the wind in one direction. By using the cable 16 andswinging the arm 5 in an opposite direction so that the blades 4 at theopposite side of the axis of the shaft 2 are exposed to the wind thesaid shaft 2 will be rotated in an opposite direction. Therefore it willbe seen that by using the arm and the shield mounted thereon the shaftmay be caused to remain at a state of rest or may be caused to rotate ineither of two directions. The vane 7 provided at the outer end of thearm will be acted upon by the wind and will promptly cause the arm 5 andshield 6 to assume such positions with relation to the blade 4 as tocause them to come to a state of rest promptly when the bolt 12 isdisengaged from one of the perforations 10 in the guide 8.

A case 11 is carried by the I In the form of the invention as shown inFig. 6, a spring pressed bolt 18 is slidably mounted under the arm 5 andextends parallel therewith. The said bolt is adapted to engage notches19 provided in the edge of the guide 8. A pulley 20 is mounted upon thearm 5 and cables 21 are trained over the pulley 20 and are attached atone end to the end of the bolt 18. The said cables are then trained overthe pulley 22 journaled under the guide 8. It is apparent that bydrawing on oneof the cables 21 the bolt 18 Will first be withdrawn fromthat notch 19 in which it is engaged and the arm 5 will then swingtoward that pulley 22 over which the said cable is trained.

Having described the invention what is claimed as new is A wind millcomprising a tower, a shaft journaled therein and provided at its upperend with a series of blades, an arcuate guide mounted upon the towerbelow the set of blades, an arm journaled upon the shaft above the guideand below the blades and extending transversely across the guide andcarrying at its outer end a vane, a wind shield mounted upon the innerend of the arm and partially inclosing the set of blades, a bracketcarried by the arm, a case carried by the bracket, a spring pressed boltslidably mounted in the case and adapted to engage the guide and a cableconnected. with the bolt.

In testimony whereof I afiix my signature in presence of two witnesses.

SAMUEL Gr. BARR.

Witnesses:

A. E. PARKI-IURST, E. M. WILSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

